add jack wait

example-clients/wait.c

@@ -0,0 +1,136 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <getopt.h>
+
+#include <time.h>
+
+#include <jack/jack.h>
+
+char * my_name;
+
+void
+show_usage (void)
+{
+	fprintf (stderr, "\nUsage: %s [options]\n", my_name);
+	fprintf (stderr, "Check for jack existence, or wait, until it either quits, or gets started\n");
+	fprintf (stderr, "options:\n");
+	fprintf (stderr, "        -s, --server <name>   Connect to the jack server named <name>\n");
+	fprintf (stderr, "        -w, --wait            Wait for server to become available\n");
+	fprintf (stderr, "        -q, --quit            Wait until server is quit\n");
+	fprintf (stderr, "        -c, --check           Check wether server is running\n");
+	fprintf (stderr, "        -t, --timeout         Wait timeout in seconds\n");
+	fprintf (stderr, "        -h, --help            Display this help message\n");
+	fprintf (stderr, "For more information see http://jackaudio.org/\n");
+}
+
+int
+main (int argc, char *argv[])
+{
+	jack_client_t *client;
+	jack_status_t status;
+	jack_options_t options = JackNoStartServer;
+	int c;
+	int option_index;
+	char *server_name = NULL;
+	int wait_for_start = 0;
+	int wait_for_quit = 0;
+	int just_check = 0;
+	int wait_timeout = 0;
+	time_t start_timestamp;
+
+	
+	struct option long_options[] = {
+		{ "server", 1, 0, 's' },
+		{ "wait", 0, 0, 'w' },
+		{ "quit", 0, 0, 'q' },
+		{ "check", 0, 0, 'c' },
+		{ "timeout", 1, 0, 't' },
+		{ "help", 0, 0, 'h' },
+		{ 0, 0, 0, 0 }
+	};
+
+	my_name = strrchr(argv[0], '/');
+	if (my_name == 0) {
+		my_name = argv[0];
+	} else {
+		my_name ++;
+	}
+
+	while ((c = getopt_long (argc, argv, "s:wqct:hv", long_options, &option_index)) >= 0) {
+		switch (c) {
+		case 's':
+			server_name = (char *) malloc (sizeof (char) * strlen(optarg));
+			strcpy (server_name, optarg);
+			options |= JackServerName;
+			break;
+		case 'w':
+			wait_for_start = 1;
+			break;
+		case 'q':
+			wait_for_quit = 1;
+			break;
+		case 'c':
+			just_check = 1;
+			break;
+		case 't':
+			wait_timeout = atoi(optarg);
+			break;
+		case 'h':
+			show_usage ();
+			return 1;
+			break;
+		default:
+			show_usage ();
+			return 1;
+			break;
+		}
+	}
+
+	/* try to open server in a loop. breaking under certein conditions */
+
+	start_timestamp = time( NULL );
+
+	while(1) {
+		client = jack_client_open ("wait", options, &status, server_name);
+		/* check for some real error and bail out */
+		if( (client == NULL) && !(status & JackServerFailed) ) {
+			fprintf (stderr, "jack_client_open() failed, "
+					"status = 0x%2.0x\n", status);
+			return 1;
+		}
+
+		if( client == NULL ) {
+			if( wait_for_quit ) {
+				fprintf( stdout, "server is gone\n" );
+				break;
+			}
+			if( just_check ) {
+				fprintf( stdout, "not running\n" );
+				break;
+			}
+		} else {
+			jack_client_close( client );
+			if( wait_for_start ) {
+				fprintf( stdout, "server is available\n" );
+				break;
+			}
+			if( just_check ) {
+				fprintf( stdout, "running\n" );
+				break;
+			}
+		}
+		if( wait_timeout ) {
+		       if( (time( NULL ) - start_timestamp) > wait_timeout ) {
+			       fprintf( stdout, "timeout\n" );
+			       break;
+		       }
+		}
+
+		// Wait a second, and repeat
+		sleep(1);
+	}
+
+	exit (0);
+}

example-clients/wscript

@@ -16,6 +16,7 @@ example_programs = {
     'jack_showtime' : 'showtime.c',
     'jack_alias' : 'alias.c',
     'jack_bufsize' : 'bufsize.c',
+    'jack_wait' : 'wait.c',
     'jack_samplerate' : 'samplerate.c',
     'jack_evmon' : 'evmon.c',
     'jack_monitor_client' : 'monitor_client.c',